Title: Modify core block
Last modified: December 17, 2020

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# Modify core block

 *  Resolved Anonymous User
 * (@anonymized-8403166)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/modify-core-block/)
 * Hi,
 * Is it possible to alter functionality of the default blocks?
 * What I want is to change File block so that one could select multiple media files
   at once. Alternatively maybe change Gallery block so it does not have mime type
   restriction and also to alter its output to resemble File block.
 * I don’t mind writing own code, it’s just that I am unfumiliar with gutenberg 
   development and could use a pointer on where to start if this is indeed possible.
    -  This topic was modified 5 years, 5 months ago by Anonymous User.
    -  This topic was modified 5 years, 5 months ago by Anonymous User.
    -  This topic was modified 5 years, 5 months ago by Anonymous User.

Viewing 1 replies (of 1 total)

 *  Plugin Author [nK](https://wordpress.org/support/users/nko/)
 * (@nko)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/modify-core-block/#post-13811100)
 * Hey.
 * Lazy Blocks let you create your own blocks. To extend core blocks you will need
   to write JS and React custom code, our plugin can’t help with it.
 * Regards, nK.

Viewing 1 replies (of 1 total)

The topic ‘Modify core block’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [nK](https://wordpress.org/support/users/nko/)
 * Last activity: [5 years, 5 months ago](https://wordpress.org/support/topic/modify-core-block/#post-13811100)
 * Status: resolved